10 results about "Photoelectrolysis" patented technology

The application provides a surface fluorine-modified bismuth vanadate photoelectrode and a preparation method and application thereof. Fluorine atoms are attached to the surface of the bismuth vanadate, and part of the fluorine atoms replace the two-coordinated oxygen atoms on the surface of the bismuth vanadate, namely the surface fluorine-modified bismuth vanadate photoelectrode. The surface fluorine-modified bismuth vanadate photoelectrode greatly improves the oxidation rate and molecular reaction efficiency of hydroxyl radicals generated by photoelectrolysis of water, effectively improves the glycerol oxidation efficiency, the selectivity of the product formic acid, and reduces the energy consumption of the reaction.

The application relates to the technical field of purification or refining of silicon compounds, in particular to a high-purity quartz sand alkali metal targeted deep removal method, wherein quartz sand is mixed with silicon carbide abrasive and dry ground, and then is immersed into a solution containing ammonium fluoroborate, nano titanium dioxide and graphene quantum dots for etching; then a composite solution containing HEDP, EDTMPA, crown ether and beta-cyclodextrin is used to complex and leach alkali metals in a microwave field; then, through a photoelectric desorption reactor, the complex is decomposed under the cooperation of ultraviolet light and an electric field; then, a supergravity rotating bed is used for three-stage countercurrent washing; finally, a radio frequency plasma treatment is used to repair the crystal lattice and remove hydroxyl groups in a hydrogen atmosphere at high temperature; through multi-step cooperation, the alkali metals are deeply removed. Through surface modification, composite complexing, photoelectric desorption and other technologies, the total alkali metal content of the quartz sand is reduced, energy consumption is reduced, waste liquid is reduced, the purity and performance of the material are improved, and the application is suitable for high-end fields such as semiconductors.

The invention belongs to the technical field of hydrogen production catalysts, and particularly relates to a photosensitive semiconductor photoelectric hydrolysis hydrogen production photoelectrode loaded with a specific catalyst and a preparation method of the photoelectrode. The cheap transition metal sulfide catalyst is constructed on the surface of the photosensitive semiconductor photoelectrode, so that the catalytic activity and the carrier separation efficiency of a photoelectrode interface are effectively improved, and the photoelectrochemical hydrogen production performance comparable with that of a noble metal catalyst is realized. The metal sulfide is stably combined with a photosensitive material, so that the system is endowed with excellent electrochemical stability, and the solar energy-to-hydrogen energy conversion efficiency is relatively high under an illumination condition. Besides, the preparation process is simple and convenient, the operation condition is mild, the raw material source is wide, the cost is low, good expandability and potential large-scale industrial application prospects are achieved, and a feasible technical scheme is provided for promoting large-scale preparation of clean hydrogen energy.

The invention relates to a surface treatment method of an ultralow-profile electrolytic copper foil suitable for high-frequency and high-speed signal transmission. The surface treatment method comprises the following steps: (1) providing a double-sided photoelectrolytic copper foil as a base material; (2) carrying out acid pickling treatment on the base material so as to remove surface oxides and activate the base material; (3) a copper alloy layer is electrically deposited on the surface of the base material subjected to acid pickling treatment; (4) performing electrochemical dealloying treatment on the copper alloy layer; (5) electrically depositing an anti-oxidation layer on the dealloyed base material; and (6) coating the substrate deposited with the anti-oxidation layer with a silane coupling agent. According to the preparation method, the traditional thought of constructing copper nodules is abandoned, the uniform copper alloy layer is deposited on the base material, then non-copper components in the copper alloy layer are selectively removed, and a nano-scale porous structure is left, so that an extremely low profile is obtained, and meanwhile, an enough specific surface area is kept to ensure excellent binding force with resin.

The application belongs to the technical field of photoelectrocatalytic materials, and particularly relates to an experimental method for rapidly preparing copper oxide nanowires and application thereof. The preparation method is as follows: using a copper mesh as a substrate, Cu(OH)2 nanowire arrays are rapidly prepared on the surface of the copper mesh through a constant-voltage anodization method, and CuO nanowire arrays are prepared in situ through rapid dehydration of the Cu(OH)2 through high-temperature heat treatment x Compared with the existing P-type semiconductor materials, the material has a wide visible light absorption range as a photoelectrocatalytic material, has good performance in the fields of photoelectrolysis of water to produce hydrogen and light-assisted Li-CO2 batteries, solves the problem of low light energy utilization, and is beneficial to separation of photo-generated electron-hole pairs, so that the copper oxide nanowire material can be used as a positive electrode material of the Li-CO2 battery to measure a charge-discharge voltage close to a theoretical value.

This invention provides a method for the resource-based treatment of tailings wastewater and the simultaneous recovery of valuable metals, belonging to the field of mine wastewater treatment technology. The method includes: constructing a reaction system, which comprises a transparent reactor with a built-in working electrode, a power-free photovoltaic cell circuit system, a powered photoelectric electrolysis circuit system, and a light source; the photovoltaic cell circuit system and the photoelectric electrolysis circuit system are switched in parallel; the tailings wastewater is introduced into the transparent reactor and sealed; the light source is turned on, and only the photovoltaic cell circuit system is activated, to oxidize ammonia nitrogen into nitrogen gas and nitrate nitrogen, and recover some manganese metal; the light source is turned on, and only the photoelectric electrolysis circuit system is activated, to reduce manganese ions to recover manganese metal and reduce nitrate nitrogen into nitrogen gas. This invention provides a clean and efficient method for simultaneously oxidizing ammonia nitrogen in mine tailings wastewater and recovering valuable metals from the tailings wastewater; it utilizes an interconvertible photovoltaic cell reaction system and a photoelectric electrolysis reaction system to efficiently degrade ammonia-containing pollutants in tailings wastewater and recover manganese metal.

The utility model discloses a kind of floating solar photolysis water oxygenation hydrogen production devices, the device is provided with water storage pool and pure water tank, pure water tank is obtained by water evaporation in water storage pool, and water is supplied to photoelectrolytic cell by inlet pipe, solar cell assembly is arranged in the frame of photoelectrolytic cell, for converting solar light into electric energy, maintaining the required bias voltage of photoelectrolytic water;Its inside is provided with photoelectrochemical water decomposition component, for the energy electrolytic water hydrogen production in ultraviolet in solar spectrum and visible spectrum, photoelectrochemical water decomposition component includes anode catalyst layer, glass layer, light absorption layer and cathode catalyst layer, anode catalyst layer uses self-bias photo catalyst electrode, oxygen is generated under catalytic action and hydrogen is produced at cathode, infrared spectrum not absorbed by light anode is further converted into bias voltage by light absorption layer and maintained photolysis water hydrogen production.

Methods, systems, and apparatus for photoelectrolytic disruption of PFAS, comprising a photoreactor vessel configured to receive an aqueous solution comprising PFAS, a UV light source configured to direct UV light onto the aqueous solution in the photoreactor vessel, a cathode within the photoreactor vessel configured to contact the aqueous solution within the photoreactor vessel, and an anode within the photoreactor vessel configured to contact the aqueous solution within the photoreactor vessel. An anode in an electrolyte solution, a power source configured to provide a voltage difference between the anode and the cathode, and a membrane or an ion bridge between the anode and the cathode. The cathode may be a mesh and may have a high surface area structure having an electrochemically active surface area greater than a geometric surface area.

The application belongs to the technical field of photoelectrolysis water material preparation, and relates to a method for preparing a non-metal element doped fullerene composite bismuth vanadate photoelectrolysis water, which comprises the following steps: s1, cleaning a conductive substrate; s2, performing non-metal element doping treatment on fullerene powder through a chemical vapor deposition method; s3, stirring modified fullerene after s2 treatment, a Bi source and a V source to prepare a catalyst slurry; s4, placing the conductive surface of the conductive substrate downward in the catalyst slurry, and performing hydrothermal in-situ growth to prepare a photoelectrocatalysis film; and s5, after natural cooling to room temperature, taking out the conductive substrate, and then heating and calcining to obtain a photoelectrolysis water electrode. The method is characterized in that the fullerene is doped with different metal elements through the chemical vapor deposition method, and then a uniform, dense and firm catalyst film is formed on the FTO through the hydrothermal in-situ growth method, and then a more stable and high-activity photoelectrolysis water electrode is obtained. The preparation method is simple, low in cost, and can realize large-scale electrode preparation.

The present invention provide a photoanode for a photoelectrolysis device, and a manufacturing method therefor. The photoanode for a photoelectrolysis device comprises: a polyimide (PI) layer; a laser-induced graphene (LIG) substrate formed by irradiating the PI layer with a laser; and a monoclinic tungsten oxide (m-WO3) nanostructure layer formed on the LIG substrate, wherein the PI layer is a flexible substrate and the photoanode is flexible.